Daily Archives: May 7, 2013

Liberator, the printed gun fires is currently designed to fire a single .308 cartridge. It is produced by printing it into a net shape from ABS thermoplastic material. The files for the printing of this product will be available free on the internet. Photo: Defense Distributed

Few months ago Texas based Defense Distributed had an idea – to produce weapon accessories using new 3D printing technology. It started with ‘printed magazines’ for AK47 made of from ABS, a thermoplastic material processed into net-shape form by 3D printers. Each magazine sells for $47. A more complex system – the lower receiver for AR15 sells for $150. But the accessories business wasn’t exciting enough. Taking technology beyond the limits was more fun. It also created a lot of buzz – over five months, 750,000 people viewed on youtube how the lower receiver fails in a firing test. So Defense Distributed decided to take the next step – produce a complete printable weapon and distribute the code free on the web, facilitating a Wikipedia like printable firearm – hence ‘WikiWep’. Defense Update reports.

Few months later, the project has got a whole new dimension, with news networks, weapon activists, even legislators airing their opinions about the risks and opportunity of 3D printed weapons, that can be produced by anyone having a commercially available 3D printer and internet access.

Liberator, the printed gun fires is currently designed to fire a single .308 cartridge. It is produced by printing it into a net shape from ABS thermoplastic material. The files for the printing of this product will be available free on the internet. Photo: Defense Distributed

Defense Distributed founder Cody Wilson says he wants to “produce and publish a file for a completely printable gun – or as near to completely printable as actually possible with current technologies.” Many are sharing their excitement – one day after releasing their dramatic test video “The Liberator” was aired it logged over 800,000 views on Youtube. During the hour it took us to write this post the number passed one million.

The weapon demonstrated in this video is simple. The largest pieces are the pistol grip and receiver device, seen surrounded by a number of smaller internal components, including the hammer’s springs. The test firing included a single .380 caliber bullet. Cody Wilson told Wired Danger Room he plans to release barrels capable of firing nine-millimeter and .22 caliber bullets. “I think a barrel like this can do five to six rounds,” Wilson said. “It’s very important you get a central strike on the primer cap, or you’ll get a misfire. We had a number of misfires in .380.” Though Wilson is critical of his gun — he calls it overbuilt, and too big, but says it’s easy to fire. There’s no safety. At one point during testing in recent weeks, one of the barrels exploded. But the design does work, he said.

There are questions about the legality of such guns, printed or not. On Sunday Senator Charles Schumer of New York call for the banning of 3-D printed handguns, because they are made of plastics which are not detectable by metal detectors. The only metal part in Wilson’s gun is the firing pin, too small to be detected by metal detectors.

The senator also proposed updating the Undetectable Firearms Act of 1988 — which bans guns that can defeat airport security metal detectors — to include printable gun magazines. Defense Distributed has a federal firearms manufacturers license, which Wilson sought after being questioned by the Bureau of Alcohol, Tobacco and Firearms in 2012. That was shortly after a 3-D printer Wilson had rented was seized by its manufacturer over worries he’d violate the Undetectable Firearms Act. The law, which is set to expire this year, exempts licensed manufacturers to produce plastic guns for use as a models and prototypes.

In few months the 3D printed weapon has become a battleground between weapons supporters and opponents in the US. Provided candidate files and prototypes can make it through testing, the next phase of this goal requires adaptation of the design down to some of the most commonly available of 3D printers. Defense Distributed has chosen the RepRap printer to be this platform, but the manufacturer is not keen about their product becoming a platform for anarchist weapon buffs.

“We hope the result will be an easily accessible and replicable design shared with the world. From such a point, any person has near-instant access to a firearm through the internet.” Wilson wrote. He doesn’t claim his new weapon is ready for use. In fact, each video shows various failures in firing. But Wilson is concerned that the safety issue will be used against his WikiWep initiative. “We want to minimize negative media about the safety concerns of untested firearms and the inevitable suggestion that government agencies are necessary protect us from ourselves.

“This project might change the way we think about gun control and consumption.” Wilson posted on his blog, “How do governments behave if they must one day operate on the assumption that any and every citizen has near instant access to a firearm through the Internet? Let’s find out.”

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The mice in each cartridge ‘work’ on a 4 hours shift, followed by 8 hours ‘off duty’. Cartridges are recycled after 14 days. Photo: Tamir eshel, Defense-Update

Next time, whoever tries to conceal on his body explosives or other contraband material, it will be detected by a sensor, but this time it may not be an artificial one, but rather, a living sensor – no other than a well trained lab mouse. i-hlsreports.

Bio Explorers, a member of TAMAR Group has developed an innovative method of detecting explosives and other contraband materials. This method is based on the training of lab mice, exploiting their ultra-sensitive sense of smell. These mice sense explosive traces odor as they are exposed to vapor emitted from the scanned material. The mice are trained to run away when they sense explosives. By tracking the movement of mice in the test chamber the system indicates the presence of specific materials.

At the first stage, Bio Explorers, successfully demonstrated a biologic detection system for locating explosives, working in cooperation with local security agencies. Further applications for the new system could include explosive detection, detection of narcotics or illegal currencies by customs authorities, detection of poisonous materials and bacterias by agriculture inspection agencies. Possible applications also include medical diagnostics and early detection of diseases.

According to the Bio Explorers, the mice can be trained to detect virtually any substance based on its odor within few days, using an automated, methodical process patented by the company. They achieve a detection rate of 90% after only 10 sessions. By adjusting the number of biosensors and sensitivity, the combined detection rate can reach 99% with false alarm rate dropping under 0.2%. The mice live in a cartridge for 14 days. The cartridge includes all food, water and sleeping accommodation. The mice in each cartridge ‘work’ on a 4 hours shift, followed by 8 hours ‘off duty’. According to the company, tests have shown that the biological sensor is far more sensitive than existing systems, including dogs and various sniffers. While existing methods rely on the detection of particles (solid or liquid) of the target materials, the biologic method rely on the natural senses to detect much lower concentrations of the target substance.

The first application is a ‘walk through explosive detector’, inspecting personnel passing the portal without requiring them to take off clothes, empty their pockets or take off their shoes. Such sensor emits no radiation offers higher privacy and faster throughput compared to the existing methods. A follow-on system currently in development is designed to inspect commercial cargos and vehicles.